Improvement in the mode of attaching springs to wagons



` .`1.H;c0nNwELL Improvement in the/Mode` of Attaching Springs to Wagons.

No,129,717,V Patemedlulyzs, 1812.

UNITEE STATES PATENT EErcEo JONATHAN H. CORNWELL, OF CORRY, PENNSYLVANIA, ASSIGNOR T() HIM- SELF AND CLARENCE G. HARMON,'OF SAME PLACE.

`IIVIFROVEMENT'IN THE MODE OF ATTACHING SPRINGS TO WAGQNS..

Specification forming part of Letters Patent No. 129,77, dated July 23, 1872.

A Specification describing a new and Improved` Vagon-Spring, invented by JONA- THAN H. CRNWELL, of Corry, in the county of Erie and State of Pennsylvania.

My invention consists of curved springs of flat metal, attached at one end to the axle and at the other to the underside of the wagon bodyor frame at the center, or the front ones will be attached at one end to a bolster, in such manner that asthe Weight of the load is increased the said springs will be proportionately stiftened by the box or frame settling down upon them from the point of their connection with it toward the other end, and so lessening the distance between the bearing points that their elasticity will be proportionately lessened. i

Figure l is a side elevation oi' a wagon with `springsarranged according to my improve ments; and Fig. 2 is a plan of the bottom of Y a wagon-box, showing the said arrangement of springs. l i

Similar letters of reference indicate corresponding parts. 1

A is the wagon-box; B, the hind axle; C,

the bolster of the front axle. E represents the i front springs, and F the hind springs, which are connected to the said axle or bolster at one end by clips or otherwise, and at the other endtothe box near its center. Said springs may, 'if preferred, consist of one semi-elliptical spring, attached t0 the box at the center, and at its ends to the axles.

It will be seen that as the said springs are pressed downward bythe load they tend to assume a horizontal line, and the bearingpoint of the box gradually extends toward the axles, so as 'to shorten the space between the bearings, by which the elasticity is reduced scribed. y

JONATHAN H. CORNWELL.

Witnesses: t

B. J. OsBoEN, C. G. HARMON. 

